Was https://github.com/coronalabs/corona/issues/705 yours, or are you just both running into the same issue?
CoronaObjects.cpp is part of a pending branch. @vlads and I have been trying to keep it up-to-date, but this little goof slipped in. You should be able to simply remove the file from the project and try to build again. (And send along a PR if it’s fixed.)
PushObjectFactories() lets you add variants of Solar2D’s objects—Rtt::DisplayObject under the hood—with customized virtual methods, either by “before” and “after” logic and / or suppressing the original behavior. In particular, this can be used to mix actual rendering calls into object updates, where they can actually have some effect: an object might Draw() some OpenGL state change, for example.